package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.aspectj.weaver.ast.Or;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.io.OutputStream;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class orderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;
    //配送区域相关配置
    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //1.处理各种异常（地址簿为空，购物车为空）【其实小程序端这些数据为空是不让下单的，但是如果postman测试的时候，
        // 是没有小程序端进行校验的。增强代码健壮性】

            //1.1查询当前用户的地址簿数据
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null){
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检查用户的收获地址是否超出配送范围
        checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

            //1.2查询当前用户的购物车数据
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);//设置查询条件
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0){
            //抛出业务异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //2.向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));//时间戳
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
//        orders.setAddress(addressBook.getDetail());
        orders.setUserId(userId);

        orderMapper.insert(orders);

        //3.向订单明细表插入n条数据（一对多）
        ArrayList<OrderDetail> orderDetailsList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());//设置与当前订单明细相关联的订单id
            orderDetailsList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailsList);

        //4.清空当前购物车数据
        shoppingCartMapper.deleteByUserId(userId);

        //5.封装vo返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderNumber(orders.getNumber())
                .orderTime(orders.getOrderTime())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

/*
        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }
*/

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","ORDERPAID");

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        paySuccess(ordersPaymentDTO.getOrderNumber());
        return vo;
    }
    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo,根据订单号修改订单状态
     */
    public void paySuccess(String outTradeNo) {//这一步是notify

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)//订单状态：待接单
                .payStatus(Orders.PAID)//支付状态：已接单
                .checkoutTime(LocalDateTime.now())//更新支付时间
                .build();

        orderMapper.update(orders);
//        通过websocket向客户端浏览器推送消息（来单提醒）
        Map map=new HashMap<>();
        map.put("type",1);//来单提醒
        map.put("oderId",ordersDB.getId());
        map.put("content", "订单号："+outTradeNo);
        String json = JSON.toJSONString(map);
        //发送消息给浏览器
        webSocketServer.sendToAllClient(json);

    }

    /**
     * C端订单分页查询
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        PageHelper.startPage(pageNum,pageSize);//当前要查询的页码，每页记录数
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();

        //1.设置查询条件：当前用户当前状态下的订单 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消 7退款
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

       //2.执行查询【得到订单list】
        Page<Orders> page=orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList();
        //3.查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);//页码总数和所有订单记录
    }


    public OrderVO details(Long id) {
        //1.根据id查询订单
        Orders orders =orderMapper.getById(id);

        //2.查询该订单对应的菜品/套餐明细
            //id和orders.getId()是一样的值，基于已经查询出来的 Orders 对象去获取其对应的菜品 / 套餐明细，这样更符合业务逻辑的表达，也增强了代码的可读性和可维护性。
        List<OrderDetail> OrderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        //3.将该订单及其明细封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(OrderDetailList);

        return orderVO;
    }


    public void userCancelById(Long id) {
        //1.根据id查询订单【要取消的订单（未修改）】
        Orders orderDB = orderMapper.getById(id);

        //2.校验订单是否存在
        if (orderDB == null ){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);//订单不存在
        }
        //3.判断订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消 7退款
        if (orderDB.getStatus()>2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);//订单状态错误(不能取消需要给商家打电话)
        }

        //4.订单处于待接单状态下需要退款
        Orders orders = new Orders();
        orders.setId(orderDB.getId());//把要修改的数据拷进新的订单，以承接以后要修改的状态和信息
        if (orderDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){//如果要取消的这个订单状态是待接单状态
            //模拟退款  修改
            orders.setPayStatus(Orders.REFUND);
        }

        //5.更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     */
//    将原订单中的商品重新加入到购物车中
    public void repetition(Long id) {
        //查询当前用户id
        Long userId = BaseContext.getCurrentId();
        //根据订单id查当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        //将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        //1.进行分页操作
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        //2.部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);
        //3.封装成分页查询结果
        return new PageResult(page.getTotal(),orderVOList);
    }


    /**
     *Orders转化为OrderVO
     * @param page
     * @return
     */
    public List<OrderVO> getOrderVOList(Page<Orders> page){
        //2.1 得到分页查询的结果
        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> ordersList = page.getResult();

        //2.2只要ordersList（查询结果）非空，就把查到的数据封装到VO
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                //2.3.1将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                //2.3.2套餐/菜品详细信息:拼接字符串
                // e.g.宫保鸡丁*3;红烧带鱼2;农家小炒肉*1;
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }
    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    public OrderStatisticsVO statistics() {
        //根据状态分别查询出待接单、代派送、派送中的订单数量
        Integer toBeConfirmed =orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer Confirmed =orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress =orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        //将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(Confirmed);
        orderStatisticsVO.setConfirmed(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 接单：商家接单其实就是将订单的状态修改为“已接单”
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     * @throws Exception
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO)  throws Exception{
        //1.根据id查询当前订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 2.只有订单处于“待接单”状态时可以执行拒单操作
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 4.拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        //3.商家拒单时，如果用户已经完成了支付，需要为用户退款
        Integer PayStatus = ordersDB.getPayStatus();
        if(PayStatus == Orders.PAID){
            //用户已支付需要退款
            orders.setPayStatus(Orders.REFUND);
        }
        //5.商家拒单其实就是将订单状态修改为“已取消”
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception{
        //1.根据id查询当前订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        //2.商家取消订单时，如果用户已经完成了支付，需要为用户退款
        // 4.拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        //3.商家拒单时，如果用户已经完成了支付，需要为用户退款
        Integer PayStatus = ordersDB.getPayStatus();
        if(PayStatus == Orders.PAID){
            //用户已支付需要退款
            orders.setPayStatus(Orders.REFUND);
        }
        //5.商家拒单其实就是将订单状态修改为“已取消”
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 派送订单
     *
     * @param id
     */
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }

    /**
     * 客户催单
     * @param id
     */
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map =new HashMap<>();
        map.put("type",2);//客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content", "订单号："+ordersDB.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));

    }
}
